1.4306 vs. 1.4307 stainless steel: what’s the difference?
1.4306 vs. 1.4307 Stainless Steel: What's the Difference?
Both 1.4306 and 1.4307 are low-carbon versions of AISI 304 stainless steel, designed for better weldability and corrosion resistance. However, they have subtle but important differences in chemical composition, nickel content, and typical applications, which can influence material selection in industries like food processing, chemical engineering, and pharmaceuticals.
1.4306 Vs. 1.4307 Stainless Steel: Equivalent Standards
| Property | 1.4306 (X2CrNi19-11) | 1.4307 (X2CrNi18-9 / 304L) |
|---|---|---|
| AISI Equivalent | 304L (High-Ni) | 304L (Standard) |
| Carbon (C) | ≤ 0.030% | ≤ 0.030% |
| Nickel (Ni) | 10.0–12.0% | 8.0–10.5% |
| Chromium (Cr) | 17.0–19.0% | 17.5–19.5% |
| Corrosion Resistance | Slightly better | Very good |
| Weldability | Excellent | Excellent |
| Magnetism | Non-magnetic (annealed) | Non-magnetic (annealed) |
| Typical Applications | Chemical, pharma, high-purity use | Food equipment, tanks, piping |
Key Differences Between 1.4306 and 1.4307
1. Nickel Content
1.4306 contains higher nickel (10–12%), which improves corrosion resistance, especially in acidic or chloride-containing environments.
1.4307 has less nickel (8–10.5%), making it more cost-effective but slightly less corrosion-resistant.
2. Application Environments
1.4306 is preferred in pharmaceuticals, chemicals, and high-end hygienic applications, where corrosion resistance is critical.
1.4307 is more commonly used in food processing, kitchen equipment, tanks, and piping, where corrosion exposure is milder.
3. Availability
1.4307 is more widely available as a standard 304L stainless steel, often chosen for general-purpose use.
1.4306 is less common and typically specified for specialized applications.
When to Use 1.4306 vs. 1.4307?
✅ Choose 1.4306 when:
Higher corrosion resistance is required.
You're working in pharma, biotech, or chemical plants.
Material must meet stricter nickel or purity requirements.
✅ Choose 1.4307 when:
You need a cost-effective, widely available 304L option.
Application involves moderate corrosion risk, like food processing or water handling.
